Gravity flow velocity into MH?
Gravity flow velocity into MH?
(OP)
I'm bringing a 20" diameter C-905 PVC forcemain to discharge into a 10' wet well. Due to the ground surface elevation, the forcemain will gravity flow several hundred feet from the high point in the line. Velocity will be around 13 fps just prior to discharging into the MH. What can I do to reduce the velocity prior to discharge into the MH?
Thanks,
Mike
Thanks,
Mike





RE: Gravity flow velocity into MH?
What I do in this situation is end the forcemain at the highpoint and run gravity down to the terminal manhole. This alleviates these problems and is usually cheaper. If you do this you can control velocities by running drops at each manhole.
RE: Gravity flow velocity into MH?
I've seen exactly what you are talking about proposed, but I dont see how gravity sewer with man holes will be cheaper?
Mike
RE: Gravity flow velocity into MH?
RE: Gravity flow velocity into MH?
RE: Gravity flow velocity into MH?
The solution doesn't have to be cheap, just work.
Any ideas other than several joints of gravity pipe?
Thanks,
Mike
RE: Gravity flow velocity into MH?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Gravity flow velocity into MH?
In your application for the vortex inserts, was it a new system, or were you fixing an existing problem area? It sounds as if you were pleased with the way they worked?
Thanks,
Mike
RE: Gravity flow velocity into MH?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Gravity flow velocity into MH?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Gravity flow velocity into MH?